JPS636403Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to an oil pan of an engine.

[Conventional technology]

As shown in FIG. 5, in an automobile engine, an oil pan 1 is attached to a cylinder block 2 (for example,
47747).

The oil pan 1 is for storing lubricating oil 3. In FIG. 5, 4 represents the liquid level of the oil 3. FIG. 6 is a top view of the oil pan 1 of FIG. 5.

In FIG. 5, if the amount of oil 3 is small, the lubricating function will not be sufficiently exhibited. On the other hand, having too much will be a waste. If the amount is too high, it may actually cause problems such as increased mechanical loss of the engine and oil leakage. Therefore, there is an optimum value for the amount of oil.

Incidentally, it is known that when the liquid level 4 of the oil 3 is at a high position in the oil pan 1, the amount of oil carried away by blow-by gas increases during engine operation.

When the amount of oil carried away by blow-by gas increases, the following problems occur.

● Oil consumption increases.

● Oil enters the combustion chamber with blow-by gas and burns, producing white smoke.

etc. As mentioned above, if the liquid level 4 of the oil 3 is at a high position, the amount of oil carried away by blow-by gas may increase, so the height of the liquid level 4 of the oil 3 should be kept as low as possible. is good. for example,
Just by lowering the liquid level 4 by about 10 mm, the amount of oil carried away will be significantly reduced.

However, as mentioned earlier, since there is an appropriate value for the oil amount, it is simply the liquid level of oil 3 that is 4.
If you just lower it, the amount of oil will decrease. Therefore, there are limits to this method. In order to lower the liquid level of the oil 3 without causing a decrease in the amount of oil, the bottom surface 12 of the oil reservoir 11 of the oil pan 1 is
There are limits to how much you can lower. Needless to say, if the bottom surface 12 of the oil reservoir 11 is lowered too much, there is a risk that the oil pan 1 will interfere with the ground while the vehicle is running.

The oil 3
In order to lower the liquid level height, an oil pan 1 as shown in FIG. 7 has been proposed (for example, the above-mentioned Utility Model Application No. 57-47747).

FIG. 7 is a perspective view of an oil pan 1 similar to that proposed in Utility Model Application No. 57-47747. The one in FIG. 7 shows the oil reservoir 11 of the oil pan 1.
is expanded in the horizontal direction (in the direction of arrow P-P). By doing this, it becomes possible to lower the liquid level of the oil 3 without causing a decrease in the amount of oil; and without lowering the bottom surface 12 of the oil reservoir 11.

In the oil pan 1 of FIG. 7, the cylinder block (not shown) is also in the same position as in FIG. In FIG. 6, the cylinder block abuts against the flange 18 around the oil pan 1. In FIG. Numeral 19 is a bolt hole through which a bolt for attaching the oil pan 1 to the cylinder block is passed. In FIG. 7, the cylinder block comes into contact with the position indicated by the chain double-dashed line indicated by the symbol B. In other words, the cylinder block does not come into contact with the left and right expanding portions 13. For this purpose, the portion 13 is covered with a plate 14 having projecting portions 15 on the left and right sides. The plate 14 is held between the oil pan 1 and a cylinder block (not shown), and is bolted to the oil pan 1.

Regarding the oil pan 1 shown in FIG. 7, there is a problem in that when the automobile makes an extremely sharp turn, for example, the oil pressure in the engine decreases, resulting in insufficient lubrication.

Let me explain this.

It is assumed that the amount of oil stored in the oil pan 1 in FIG. 7 is equal to the amount of oil stored in the oil pan 1 in FIG. 5. This is the seventh
This means that the oil level in the oil pan 1 shown in the figure is lower than the oil level in the oil pan 1 shown in FIG.

FIG. 8 is a cross-sectional view taken from FIG. 7. 9th
The figure is a - sectional view of FIG. FIG. 8 shows the oil level height h of the oil pan 1 shown in FIG. 7. FIG. 9 shows the oil level height H of the oil pan 1 shown in FIG. 5.

Now, it is assumed that an automobile equipped with the oil pan 1 shown in FIG. 7 makes an extremely sharp turn in either the left or right direction, for example, in the right direction (in the direction of arrow C in FIG. 7). Due to the centrifugal force generated by such a sharp turn, the oil 3 in the oil pan 1 (strictly speaking, in the oil reservoir 11) is pushed against the left side wall 16 as shown by D in FIG. biased toward In Fig. 8, 4 is the liquid level of oil 3 in a horizontal state;
4' represents the liquid level of oil 3 during sharp turns.
17 is an oil strainer for pumping out oil. The oil suction port of the oil strainer 17 is designated by the reference numeral 21.

As can be seen from FIG. 8, in such a case, the oil suction port 21 is exposed to the atmosphere, so the oil 3 is not pumped out. Therefore, the oil pressure in the engine decreases, resulting in insufficient lubrication. Additionally, in the driver's seat, the oil pressure warning lamp on the instrument panel lights up.

On the other hand, in the case of an automobile equipped with the oil pan 1 shown in FIG. 5, as can be seen from FIG. 9, the oil level H is originally high. For this reason, even in the case of a sharp turn, unless it is a serious problem, the oil suction port 21
exposure to the atmosphere does not occur.

As one of the measures to solve the above-mentioned problems regarding the oil pan 1 shown in FIG.
It has been proposed to provide a buff-full plate in the oil reservoir 11 of the oil pan 1 shown in FIG.

For example, the buff-full plate disclosed in Japanese Utility Model Application No. 57-47747 covers the entire upper surface of the oil reservoir 11, as indicated by the reference numeral 22 in FIG. In FIG. 10, 23 is a hole into which the oil strainer 17 (see FIG. 8) is inserted. What is shown in Fig. 10 is, as can be seen from c in Fig. 10,
This is an attempt to suppress the movement of the oil 3 with the full plate 22.

In addition, the buffer plate disclosed in another known document (Toyota Corona New Model Car Manual, P. 122, January 26, 1980, Toyota Motor Sales Co., Ltd. Service Department) is indicated by the symbol 22 in Fig. 11.
As shown in , the oil reservoir portion 11 is divided into left and right widening portions 13 and a central portion 24 . In the case of the oil pan 1 shown in FIG.
2 prevents the oil 3 from moving in the left and right direction.

Note that the phenomenon that "the oil suction port 21 of the oil strainer 17 is exposed to the atmosphere and no oil is sucked in" occurs not only when the vehicle makes a sudden turn to the left or right, but also when the vehicle starts suddenly or suddenly. It can also occur due to setbacks.

[Problem that the invention attempts to solve]

The problem shown in FIG. 10 or 11 is that it is insufficient to prevent the oil 3 from becoming uneven.

This will be explained.

In the one shown in FIG. 10, the full plate 22 serves as the roof of the oil reservoir 11, but as can be seen from c in FIG. Since there is no wall dividing the area, when the automobile makes a sharp turn from side to side, it is inevitable that the oil 3 will move to the left and right wide areas 13.

In addition, in the case of FIG. 10, as can be seen from b in FIG. 10, regarding the front portion 31 of the oil pan 1, the oil pan 1 and the buttful plate 22 are connected immediately. This is effective against oil movement caused by sudden reversing of a car.
However, since there is a gap 33 between the full plate 22 and the rear part 32 of the oil pan,
It is not effective against oil movement caused by sudden acceleration of a car.

In the case of the one shown in FIG. 11, the full plate 22 serves as a wall that partitions the left and right wide portions 13 and the central portion 24, and the plate 14 is attached above the oil pan 1. , the plate 14 itself becomes the roof of the oil reservoir 11.
However, as can be seen from FIG. 11, since the buff-full plate 22 does not extend to the flange 18 of the oil pan 1, a gap 25 is created between the buff-full plate 22 and the plate 15. Therefore, if the car makes a sharp turn left or right, the oil 3
It is unavoidable that the gap 25 moves to the left and right widening portions 13.

In addition, in Fig. 11, the sudden start of the car,
It is not effective against oil movement due to sudden reversal. This is because, as can be seen from FIG. 11, no measures have been taken to address these situations.

As can be seen from the above explanation, both the one shown in FIG. 10 and the one shown in FIG. 11 are insufficient to prevent the oil 3 from becoming uneven.

In addition, in order to deal with all cases of sudden turns, sudden starts, and sudden retreats of the automobile, it can be seen that the following steps can be taken with reference to FIGS. 10 and 11.

● First, in the one in Figure 10,
occlude.

●Next, in the case shown in FIG. 11, the buttful plate 22 is extended until it comes into contact with the plate 15.

● Then, you can create a combination of Figures 10 and 11.

However, such a method is unknown. below,
For convenience of explanation, such an oil pan will be referred to as oil pan X.

However, the oil pan X also had a new problem other than the oil imbalance, as described below.

That is, the oil pan X requires a total of three buttfull plates, such as one buttfull plate 22 in FIG. 10 and two buttfull plates 22 in FIG. 11.

Therefore, when manufacturing the oil pan X, managing and storing the bulk plate 22 becomes extremely troublesome.
In particular, regarding the double plate 22 in Fig. 11, there are: ● There are two plates, ● These have different left and right shapes due to the presence of flanges for welding (the part marked with numeral 29 in Fig. 11). However, since these double plates 22 have very similar shapes, care must be taken to identify them on the assembly line at an automobile factory. This is extremely undesirable in mass-produced products such as automobiles.

Therefore, oil pan X has a problem in that it cannot be said to be very practical in this respect.

Here, it should be noted that the reason why the oil pan

The present invention has been made in order to solve the problems of such conventional techniques.

The technical problem with this invention is that with regard to oil pans that spread out from side to side, ``When a car makes a sharp turn, starts suddenly, or suddenly reverses, the oil inlet of the oil strainer is exposed to the atmosphere, causing oil to leak into the engine. The purpose is to solve the problem of "not being supplied to various parts" by simply providing one buff-full plate.

[Means for solving problems]

In order to achieve this technical problem (that is, to solve the problems of the prior art described above), the following measures are taken in the present invention.

That is, the oil pan of the engine according to the present invention is an oil pan that has an oil reservoir and a rear part of the oil pan in order from the front. A communicating widening portion is provided, and a buttful plate is attached to the oil reservoir portion, and the buttful plate is composed of a roof portion, a left side wall portion, and a right side wall portion. The part, the left side wall part and the right side wall part are continuous, so that the baffle plate has a U-shaped cross section in a cross section perpendicular to the longitudinal direction of the oil pan, and the left side wall part and the right side wall part are continuous. The wall portions are located at the boundaries between the left and right widening portions and the oil reservoir portion, and the roof portion is located above the oil reservoir portion, and the roof portion is located in front of the oil pan. The baffle plate is in contact with the side wall and the bottom wall of the rear part of the oil pan, and the entire baffle plate is made of a single metal plate.

[Effect]

When designing this invention, attention should be paid to the following four points.

(A) The roof, left wall, and right wall are continuous.

(i) The left side wall and right side wall are located at the border between the left and right widening areas and the oil reservoir, respectively.

(c) The roof portion is placed above the oil reservoir, and the roof portion is in contact with the front side wall of the oil pan and the bottom wall at the rear of the oil pan.

(E) The entire Batsuful plate is made of a single metal plate.

Due to the configurations of (a), (i) and (c) above,
“In the case of a sudden turn, sudden start, or sudden retreat of a car,
This solves the problem that the oil suction port of the oil strainer is exposed to the atmosphere and oil is not supplied to various parts of the engine.

Further, with the configuration (e) above, it is possible to solve this problem by simply providing one buff-full plate.

The structure (means and effect) of the present invention will be made clearer from the following examples. Therefore, examples will now be described.

〔Example〕

FIG. 1 is a longitudinal sectional view of an oil pan of an engine according to an embodiment of the present invention. An oil pan (hereinafter simply referred to as an oil pan) 1 of the engine according to this embodiment is attached to a cylinder block 2. The oil pan 1 is comprised of an oil reservoir 11 and an oil pan rear part 32 in order from the front. FIG. 2 is a top view of the oil pan 1 of FIG. 1. As can be seen from FIG. 2, the oil pan 1 has a flared portion 13. The widening portions 13 are provided on the left and right sides of the oil reservoir portion 11 (in the direction of arrow P).

Returning to Figure 1, 3 is the stored oil,
4 is the liquid level of the oil 3. In the oil pan 1 of this embodiment, the height h of the liquid level 4 of the oil 3 is:
The liquid level height H is set lower than the liquid level height H of the oil pan 1 without the widening part 13 as shown in FIG. However, the amount of oil is the same as that in FIG. 5 because of the expanded portion 13. In FIG. 1, the broken line represents the liquid level height H in FIG. This is for comparison with h. The reason why h<H in this embodiment is to reduce the amount of oil carried away by blow-by gas.

FIG. 3 is a cross-sectional view of FIG. 1. Third
As can be seen from the figure, a baffle plate 41 is attached to the oil reservoir 11. The full plate 41 is made of one continuous metal plate. The baffle plate 41 is made by press-molding a flat metal plate.

The baffle plate 41 will be explained.

In FIG. 3, the baffle plate 41 is composed of a roof portion 42, a left side wall portion 43, and a right side wall portion 44. The roof part 42, the left side wall part 43, and the right side wall part 44 are continuous. Batsuful plate 4
1 has a U-shaped cross section in a direction perpendicular to the longitudinal direction of the oil pan 1 (the Q-Q direction in FIG. 1).

In FIG. 3, a through hole 23 is bored in the roof portion 42. As shown in FIG. 17 is an oil strainer, 21
is an oil suction port of the oil strainer 17. The through hole 23 is for passing the oil strainer 17 therethrough.

The width a between the left side wall portion 43 and the right side wall portion 44, that is, the length of the roof portion 42, is the maximum width of the rear portion of the oil pan 32.
The width is said to be about the same as the width A (see Figure 2).
Since a is small, it doesn't matter how small it is. However, needless to say, the width must be greater than the width of the oil strainer 17. Usually a=
(0.8 to 1.2) x A is good.

The height b of the left side wall 43 and the right side wall 44 is slightly larger than the oil level height h.

As can be seen from FIG. 3, the left side wall 43 and the right side wall 44 are welded to the bottom wall 12 of the oil reservoir 11.

As can be seen from FIG. 1, the roof portion 42 extends in the longitudinal direction (Q-Q direction) of the oil pan 1, and its front portion 51 is welded to the front side wall 52 of the oil pan 1. A rear portion 53 of the roof portion 42 is welded to a bottom wall 54 of the oil pan rear portion 32. Regarding the left side wall part 43 and the right side wall part 44 (however, only the right side wall part 44 is shown in FIG. 1), there are gaps between the front side wall 52 of the oil pan 1 and the rear part 32 of the oil pan, respectively. A slight gap 55, 56 is provided.

Here, the characteristics of the buff-full plate 41 of this embodiment are summarized as follows.

As can be seen from FIG. 3, a left side wall part 43 and a right side wall part 44 are provided around the boundary between the left and right widening parts 13 and the central part 24 of the oil reservoir part 11.

As can be seen from FIG. 3, a roof section 42 is provided above the oil reservoir section 11.

As can be seen from FIG. 1, the roof portion 42 is in contact with the front wall 52 of the oil pan 1.

As can be seen from FIG. 1, the roof portion 42 is in contact with the bottom wall 54 of the oil pan rear portion 32 of the oil pan 1.

The entire Batsuful plate 41 is made of a single metal plate.

In this embodiment, since the buffer plate 41 having the above-mentioned structure is provided, even when the automobile makes a sudden turn, starts suddenly, or suddenly reverses, the oil in the oil reservoir 11 is biased in a specific direction. The oil suction port 21 of the oil strainer 17 is never exposed to the atmosphere.

For example, when the automobile makes a sudden turn to the right (in the direction of arrow C in FIG. 2), the oil 3 in the center portion 24 is blocked by the left side wall 43, as shown by F in FIG. remain in the Therefore, the oil suction port 21 of the oil strainer 17 is not exposed to the atmosphere.

As can be seen from FIG. 1, when the vehicle suddenly starts, the oil 3 similarly remains in the oil reservoir 11 (more precisely, in the central portion 24) due to the above-described structure.

When the automobile suddenly backs up, the oil 3 similarly remains in the oil reservoir 11 (more precisely, in the central portion 24) due to the above-described structure, as can be seen from FIG.

Therefore, in this embodiment, the oil suction port 21 of the oil strainer 17 will not be exposed to the atmosphere no matter what situation the automobile is in.

In this embodiment, attention should also be paid to the above configuration. Because of this configuration, the double plate 41 has a complicated shape, but since it is just one component, the double plate 41 has a complicated shape.
1 is easy to manage and store.

Further, since the buff-full plate 41 has a U-shaped cross section and is welded to the oil pan 1, the rigidity of the oil pan 1 is also increased. Therefore, the noise generated by the vibration of the oil pan 1 is also reduced.

[Effect of the invention]

As can be seen from the description of the above embodiments, according to the present invention, "when a car makes a sharp turn, starts suddenly, or suddenly reverses, the oil suction port of the oil strainer is exposed to the atmosphere, and oil is supplied to each part of the engine." This has the effect that it is possible to solve the problem of "no longer being used" by simply providing a single buttful plate.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of an oil pan of an engine according to an embodiment of the present invention, FIG. 2 is a top view of an oil pan of an engine according to an embodiment of the present invention, and FIG.
The figures are a sectional view of FIG. 1, FIG. 4 is an explanatory diagram showing the state of oil movement in the oil pan of an engine according to an embodiment of the present invention, and FIG. 5 is an illustration of the oil pan of a conventional engine. The longitudinal cross-sectional view, Figure 6, is
A top view of an oil pan of a conventional engine, and FIG. 7 is a perspective view of an oil pan of another conventional engine.
8 is an explanatory diagram showing the state of oil movement in the oil pan of FIG. 7, FIG. 9 is an explanatory diagram showing the state of oil movement in the oil pan of FIG. 5,
Fig. 10a is a top view of the oil pan of Fig. 7 equipped with a full plate, and Fig. 10b is a
The Y-Y sectional view of a in FIG. 10 and c in FIG. 10 are
FIG. 10b is a Z-Z sectional view of b, and FIG. 11 is a perspective view of the oil pan of FIG. 7 provided with another baffle plate. 1...Oil pan (engine oil pan),
11...Oil reservoir portion, 13...Spreading portion, 32
... Rear part of oil pan, 41 ... Full plate, 42 ... Roof section, 43 ... Left side wall section, 44 ...
...Right side wall portion, 52...Front side wall, 54...Bottom wall at the rear of the oil pan.

Claims (1)

[Scope of utility model registration request] The oil pan has an oil reservoir and a rear part of the oil pan in order from the front, and widening parts communicating with the oil reservoir are provided on the left and right sides of the oil reservoir. A buttful plate is attached to the board, and the buttfull plate is composed of a roof, a left side wall, and a right side wall, and the roof, left side wall, and right side wall are continuous. As a result, the double plate has a U-shaped cross section perpendicular to the longitudinal direction of the oil pan, and the left side wall portion and the right side wall portion are respectively the left and right expanding portions and the oil reservoir portion. The roof portion is located above the oil reservoir portion, and the roof portion is in contact with the front side wall of the oil pan and the bottom wall at the rear of the oil pan. , an engine oil pan characterized in that the entire double plate is made of a single metal plate.